XHW-C
Flexible Coupling – Disk Type
Dimension Drawing
Dimensions/Specifications/CAD
| Part Number | A | L | E | W | F | G | M | Wrench Torque (N･m) |
|---|---|---|---|---|---|---|---|---|
| XHW-15C | 15 | 7.5 | 6.3 | 21.6 | 2.1 | 5 | M2 | 0.45 |
| XHW-19C | 19 | 9.2 | 8.5 | 25.7 | 2.6 | 7 | M2 | 0.5 |
| XHW-25C | 25 | 11 | 12.5 | 32.2 | 3.3 | 9.25 | M2.5 | 1 |
| XHW-27C | 27 | 11 | 14.5 | 32.2 | 3.3 | 10.25 | M2.5 | 1 |
| XHW-34C | 34 | 12.5 | 16.5 | 36.8 | 3.75 | 13 | M3 | 1.5 |
| XHW-39C | 39 | 15.5 | 20.5 | 46.6 | 4.5 | 14.5 | M4 | 3.5 |
| XHW-44C | 44 | 15.5 | 22.5 | 46.6 | 4.5 | 17 | M4 | 3.5 |
| XHW-56C | 56 | 20.5 | 28.5 | 61.2 | 6 | 21 | M5 | 8 |
| XHW-64C | 64 | 24 | 36 | 74.4 | 7 | 24 | M6 | 13 |
| XHW-79C | 79 | 30 | 43 | 97.2 | 8.75 | 29 | M8 | 28 |
| Part Number | Max. Bore Diameter (mm) | Rated Torque* (N・m) | Max. Torque* (N・m) | Max. Rotational (min-1) | Static Torsional Stiffness (N・m/rad) | Max. Lateral Misalignment (mm) | Max. Angular Misalignment (°) | Max. Axial Misalignment (mm) | Mass** (g) |
|---|---|---|---|---|---|---|---|---|---|
| XHW-15C | 6 | 0.6 | 1.2 | 42000 | 100 | 0.1 | 1.4 | ±0.2 | 9.4 |
| XHW-19C | 8 | 1.5 | 3 | 33000 | 300 | 0.12 | 2 | ±0.2 | 17 |
| XHW-25C | 12 | 3 | 6 | 25000 | 1000 | 0.15 | 2 | ±0.3 | 35 |
| XHW-27C | 14 | 3.3 | 6.6 | 23000 | 1400 | 0.15 | 2 | ±0.4 | 39 |
| XHW-34C | 16 | 6.3 | 12.6 | 18000 | 2500 | 0.2 | 2 | ±0.5 | 75 |
| XHW-39C | 20 | 12 | 24 | 16000 | 4700 | 0.25 | 2 | ±0.5 | 123 |
| XHW-44C | 22 | 15 | 30 | 14000 | 6400 | 0.25 | 2 | ±0.6 | 156 |
| XHW-56C | 28 | 37.5 | 75 | 11000 | 12000 | 0.3 | 2 | ±0.7 | 340 |
| XHW-64C | 35 | 50 | 100 | 9800 | 15000 | 0.35 | 2 | ±0.9 | 490 |
| XHW-79C | 42 | 100 | 200 | 7900 | 22000 | 0.5 | 2 | ±1.1 | 1100 |
* Correction of rated torque and max. torque due to load fluctuation is not required.
** These are values with max. bore diameter.
| Part Number | Stock Bores D1-D2 | ||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3 | 4 | 5 | 6 | 6.35 | 8 | 9.525 | 10 | 11 | 12 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 22 | 24 | 25 | 28 | 30 | 32 | 35 | 38 | 40 | 42 | |
| XHW-15C | ● | ● | ● | ● | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| XHW-19C | ● | ● | ● | ● | ● | ● | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| XHW-25C | – | ● | ● | ● | ● | ● | ● | ● | ● | ● | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| XHW-27C | – | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| XHW-34C | – | – | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| XHW-39C | – | – | – | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | – | – | – | – | – | – | – | – | – | – |
| XHW-44C | – | – | – | – | – | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | – | – | – | – | – | – | – | – | – |
| XHW-56C | – | – | – | – | – | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | – | – | – | – | – | – |
| XHW-64C | – | – | – | – | – | – | – | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | – | – | – |
| XHW-79C | – | – | – | – | – | – | – | – | – | – | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● |
All products are provided with hex socket head cap screw.
Recommended dimensional allowances of applicable shaft diameter are h6 and h7.
In case of mounting on D-cut shaft, be careful about the position of the D-cut surface of the shaft.
Material/Finish
| XHW-C / XHW-C-L | |
|---|---|
| Hub | A2017 Alumite Treatment |
| Spacer | A2017 Alumite Treatment |
| Disk fixing bolt | SCM435 Ferrosoferric Oxide Film (Black) |
| Disk | SUS304 |
| Collar | SUS304 |
| Hex Socket Head Cap Screw | SCM435 Ferrosoferric Oxide Film (Black) |
Structure
Clamping type XHW-C
XHW-C Standard Type
XHW-C-L Long Type
Characteristics
- Applicable motors
XHW / XHW-L Servomotor ◎ Stepping Motor ◎ General-Purpose Motor ◎ ◎: Excellent ○: Very good
- Property
XHW / XHW-L Zero Backlash ◎ High gain supported ○ High Torque ◎ High Torsional Stiffness ◎ Allowable Misalignment ○ ◎: Excellent ○: Very good
- This is a disk-type flexible coupling.
- High-torque specification with rated torque 1.5 times higher than conventional products.
- This is the most appropriate for a servomotor with the instantaneous max. torque of 350%.
- The stainless steel Disk allows the eccentricity, angular misalignment, and end-play.
Application
Actuator / Surface-mount machine / High precision XY stage / Index table
Selection
The area bounded by the shaft diameter and rated torque indicates is the selection size.
Selection example
In case of selected parameters of shaft diameter of φ14 and load torque of 3 N•m, the selection size is XHW-27C.
XHW supports the servomotor with instantaneous max. torque increased to 350% of the rated torque and the size can be more reduced than the size of conventional product XBW.
| Rated Output (W) | Servomotor type | Servomotor Specifications＊ | selection size | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Mitsubishi Electric Corporation | YASKAWA Electric Corporation | SANYO DENKI Co., Ltd. | KEYENCE CORPORATION | Diameter of Motor Shaft (mm) | Rated Torque (N・m) | Instantaneous Max. Torque (N・m) | XHW-C | XBW-C | |
| 100 | HG-KR | SGMJV | R2 | SV | 8 | 0.32 | 1.1 | XHW-19C | XBW-25C |
| 200 | 14 | 0.64 | 2.2 | XHW-27C | XBW-34C | ||||
| 400 | 14 | 1.3 | 4.5 | XHW-34C | XBW-39C | ||||
| 750 | 16-19 | 2.4 | 8.4 | XHW-39C | XBW-44C | ||||
＊Motor specifications are based on general values. For details, see the motor manufacturer’s catalogs. This is the size for cases where devices such as reduction gears are not used.
Thrust Reaction Force
Slip Torque
Concerning the sizes shown in the table, please note that the shaft’s slip torque is smaller than the max. torque of XHW-CXHW-C-L.
| Part Number | Bore diameter（mm） | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3 | 4 | 5 | 6 | 6.35 | 8 | 9.525 | 10 | 11 | 12 | 14 | 15 | 16 | |
| XHW-15C | 0.7 | ||||||||||||
| XHW-19C | 0.7 | 1.7 | 3 | ||||||||||
| XHW-25C | 2.5 | 3.6 | 4.7 | 5 | |||||||||
| XHW-27C | 2 | 2.9 | 4 | 4.2 | 5.8 | ||||||||
| XHW-34C | 3.5 | 4.9 | 5.5 | 7.9 | 10.5 | 11.2 | 12.5 | ||||||
| XHW-39C | 6 | 8 | 13 | 18 | 19.5 | 23 | |||||||
| XHW-44C | 8 | 13 | 15 | 20.5 | 26 | ||||||||
| XHW-56C | 22 | 34 | 37 | 45 | 55 | 66 | |||||||
| XHW-64C | 23 | 42 | 60 | 88 | |||||||||
| XHW-79C | 140 | 150 | 180 | ||||||||||
| XHW-19C-L | 0.7 | 1.7 | 3 | ||||||||||
| XHW-25C-L | 2.5 | 3.6 | 4.7 | 5 | |||||||||
| XHW-27C-L | 2 | 2.9 | 4 | 4.2 | 5.8 | ||||||||
| XHW-34C-L | 3.5 | 4.9 | 5.5 | 7.9 | 10.5 | 11.2 | 12.5 | ||||||
| XHW-39C-L | 6 | 8 | 13 | 18 | 19.5 | 23 | |||||||
These are test values based on the condition of shaft’s dimensional allowance: h7, hardness: from 34-40 HRC, and screw tightening torque of the values described in XHW-CXHW-C-L dimensional table.
Change in static torsional stiffness due to temperature
This is a value under the condition where the static torsional stiffness at 20°C is 100%.
The change of XHW in torsional stiffness due to temperature is small and the change in responsiveness is extremely small. However, if the unit is used at higher temperature, be careful about misalignment due to elongation or deflection of the shaft associated with thermal expansion.
Static torsional stiffness comparison (double disc-type)
XHW have high torsional stiffness and responsiveness.
Optimal for high-speed and precision positioning for servomotors, etc.
Eccentric Reaction Force
